[RFC] Update to current automake/autoconf/libtool versions.

[Tom Tromey]

>>>>> "Zack" == Zack Weinberg <zack@codesourcery.com> writes:

Zack> Someone on the autoconf team knew about this and tried to help out by
Zack> providing an undocumented macro called AC_NO_EXECUTABLES:

Zack> # FIXME: The GCC team has specific needs which the current Autoconf
Zack> # framework cannot solve elegantly.  This macro implements a dirty
Zack> # hack until Autoconf is abble to provide the services its users
Zack> # needs.

Zack> They are only executed in a native compilation, but that's not good
Zack> enough for AC_NO_EXECUTABLES.

Presumably if AC_NO_EXECUTABLES exists solely for the use of gcc, then
it could be changed to do what gcc actually requires.

Tom